You can see the full changelog here.
Changed:
- [BREAKING] The token input has been removed: author info will be filled using the GitHub Actor, instead of fetching info from the GitHub API.
The commits will be authored using the GitHub no-reply email associated with the account: username@users.noreply.github.com - [BREAKING] Because of the change above, the author will now be the user that triggered the action run, and not the author of the last commit: while the two are often the same person, there are instances where they might differ (e.g. when a workflow run is triggered manually).